diff --git a/BasiliskII/src/Unix/prefs_editor_gtk.cpp b/BasiliskII/src/Unix/prefs_editor_gtk.cpp
index 637e1e67..d7ceae8c 100644
--- a/BasiliskII/src/Unix/prefs_editor_gtk.cpp
+++ b/BasiliskII/src/Unix/prefs_editor_gtk.cpp
@@ -1297,7 +1297,7 @@ static GList *add_serial_names(void)
 		closedir(d);
 	}
 	if (glist)
-		g_list_sort(glist, gl_str_cmp);
+		glist = g_list_sort(glist, gl_str_cmp);
 	else
 		glist = g_list_append(glist, (void *)GetString(STR_NONE_LAB));
 	return glist;
@@ -1339,7 +1339,7 @@ static GList *add_ether_names(void)
 	glist = g_list_append(glist, s_slirp);
 #endif
 	if (glist)
-		g_list_sort(glist, gl_str_cmp);
+		glist = g_list_sort(glist, gl_str_cmp);
 	else
 		glist = g_list_append(glist, (void *)GetString(STR_NONE_LAB));
 	return glist;
diff --git a/SheepShaver/src/Unix/prefs_editor_gtk.cpp b/SheepShaver/src/Unix/prefs_editor_gtk.cpp
index b092e824..a3984f34 100644
--- a/SheepShaver/src/Unix/prefs_editor_gtk.cpp
+++ b/SheepShaver/src/Unix/prefs_editor_gtk.cpp
@@ -1144,7 +1144,7 @@ static GList *add_serial_names(void)
 		closedir(d);
 	}
 	if (glist)
-		g_list_sort(glist, gl_str_cmp);
+		glist = g_list_sort(glist, gl_str_cmp);
 	else
 		glist = g_list_append(glist, (void *)"<none>");
 	return glist;
@@ -1186,7 +1186,7 @@ static GList *add_ether_names(void)
 	glist = g_list_append(glist, s_slirp);
 #endif
 	if (glist)
-		g_list_sort(glist, gl_str_cmp);
+		glist = g_list_sort(glist, gl_str_cmp);
 	else
 		glist = g_list_append(glist, (void *)"<none>");
 	return glist;